YiiRequirementChecker.php 11.2 KB
Newer Older
1 2 3 4 5 6 7
<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

8 9 10 11 12
if (version_compare(PHP_VERSION, '4.3', '<')) {
	echo 'At least PHP 4.3 is required to run this script!';
	exit(1);
}

13
/**
14 15
 * YiiRequirementChecker allows checking, if current system meets the requirements for running the Yii application.
 * This class allows rendering of the check report for the web and console application interface.
16
 *
17 18 19
 * Example:
 * <code>
 * require_once('path/to/YiiRequirementChecker.php');
20
 * $requirementsChecker = new YiiRequirementChecker();
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
 * $requirements = array(
 *     array(
 *         'name' => 'PHP Some Extension',
 *         'mandatory' => true,
 *         'condition' => extension_loaded('some_extension'),
 *         'by' => 'Some application feature',
 *         'memo' => 'PHP extension "some_extension" required',
 *     ),
 * );
 * $requirementsChecker->checkYii()->check($requirements)->render();
 * <code>
 *
 * If you wish to render the report with your own representation, use [[getResult()]] instead of [[render()]]
 *
 * Requirement condition could be in format "eval:PHP expression".
 * In this case specified PHP expression will be evaluated in the context of this class instance.
 * For example:
 * <code>
 * $requirements = array(
 *     array(
 *         'name' => 'Upload max file size',
 *         'condition' => 'eval:$this->checkUploadMaxFileSize("5M")',
 *     ),
 * );
 * </code>
 *
 * @property array|null $result the check results, this property is for internal usage only.
48
 *
49 50 51 52 53
 * @author Paul Klimov <klimov.paul@gmail.com>
 * @since 2.0
 */
class YiiRequirementChecker
{
54 55 56
	/**
	 * Check the given requirements, collecting results into internal field.
	 * This method can be invoked several times checking different requirement sets.
57
	 * Use [[getResult()]] or [[render()]] to get the results.
58 59 60
	 * @param array|string $requirements requirements to be checked.
	 * If an array, it is treated as the set of requirements;
	 * If a string, it is treated as the path of the file, which contains the requirements;
61 62
	 * @return YiiRequirementChecker self instance.
	 */
63 64
	function check($requirements)
	{
65 66 67
		if (is_string($requirements)) {
			$requirements = require($requirements);
		}
68
		if (!is_array($requirements)) {
69
			$this->usageError('Requirements must be an array, "'.gettype($requirements).'" has been given!');
70
		}
71
		if (!isset($this->result) || !is_array($this->result)) {
72 73 74 75 76 77 78 79 80
			$this->result = array(
				'summary' => array(
					'total' => 0,
					'errors' => 0,
					'warnings' => 0,
				),
				'requirements' => array(),
			);
		}
81 82
		foreach ($requirements as $key => $rawRequirement) {
			$requirement = $this->normalizeRequirement($rawRequirement, $key);
83
			$this->result['summary']['total']++;
84 85 86 87
			if (!$requirement['condition']) {
				if ($requirement['mandatory']) {
					$requirement['error'] = true;
					$requirement['warning'] = true;
88
					$this->result['summary']['errors']++;
89 90 91
				} else {
					$requirement['error'] = false;
					$requirement['warning'] = true;
92
					$this->result['summary']['warnings']++;
93 94 95 96 97
				}
			} else {
				$requirement['error'] = false;
				$requirement['warning'] = false;
			}
98
			$this->result['requirements'][] = $requirement;
99
		}
100 101 102
		return $this;
	}

103 104 105 106 107 108 109 110 111
	/**
	 * Performs the check for the Yii core requirements.
	 * @return YiiRequirementChecker self instance.
	 */
	public function checkYii()
	{
		return $this->check(dirname(__FILE__).DIRECTORY_SEPARATOR.'yiirequirements.php');
	}

112 113
	/**
	 * Return the check results.
114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
	 * @return array|null check results in format:
	 * <code>
	 * array(
	 *     'summary' => array(
	 *         'total' => total number of checks,
	 *         'errors' => number of errors,
	 *         'warnings' => number of warnings,
	 *     ),
	 *     'requirements' => array(
	 *         array(
	 *             ...
	 *             'error' => is there an error,
	 *             'warning' => is there a warning,
	 *         ),
	 *         ...
	 *     ),
	 * )
	 * </code>
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147
	 */
	function getResult()
	{
		if (isset($this->result)) {
			return $this->result;
		} else {
			return null;
		}
	}

	/**
	 * Renders the requirements check result.
	 * The output will vary depending is a script running from web or from console.
	 */
	function render()
	{
148
		if (!isset($this->result)) {
149 150
			$this->usageError('Nothing to render!');
		}
151 152 153 154 155 156 157 158 159
		$baseViewFilePath = dirname(__FILE__).DIRECTORY_SEPARATOR.'views';
		if (array_key_exists('argv', $_SERVER)) {
			$viewFileName = $baseViewFilePath.DIRECTORY_SEPARATOR.'console'.DIRECTORY_SEPARATOR.'index.php';
		} else {
			$viewFileName = $baseViewFilePath.DIRECTORY_SEPARATOR.'web'.DIRECTORY_SEPARATOR.'index.php';
		}
		$this->renderViewFile($viewFileName, $this->result);
	}

160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283
	/**
	 * Checks if the given PHP extension is available and its version matches the given one.
	 * @param string $extensionName PHP extension name.
	 * @param string $version required PHP extension version.
	 * @param string $compare comparison operator, by default '>='
	 * @return boolean if PHP extension version matches.
	 */
	function checkPhpExtensionVersion($extensionName, $version, $compare='>=')
	{
		if (!extension_loaded($extensionName)) {
			return false;
		}
		$extensionVersion = phpversion($extensionName);
		if (empty($extensionVersion)) {
			return false;
		}
		return version_compare($extensionVersion, $version, $compare);
	}

	/**
	 * Checks if PHP configuration option (from php.ini) is on.
	 * @param string $name configuration option name.
	 * @return boolean option is on.
	 */
	function checkPhpIniOn($name)
	{
		$value = ini_get($name);
		if (empty($value)) {
			return false;
		}
		return ((integer)$value==1 || strtolower($value) == 'on');
	}

	/**
	 * Checks if PHP configuration option (from php.ini) is off.
	 * @param string $name configuration option name.
	 * @return boolean option is off.
	 */
	function checkPhpIniOff($name)
	{
		$value = ini_get($name);
		if (empty($value)) {
			return true;
		}
		return (strtolower($value) == 'off');
	}

	/**
	 * Compare byte sizes of values given in the verbose representation,
	 * like '5M', '15K' etc.
	 * @param string $a first value.
	 * @param string $b second value.
	 * @param string $compare comparison operator, by default '>='.
	 * @return boolean comparison result.
	 */
	function compareByteSize($a, $b, $compare='>=')
	{
		$compareExpression = '('.$this->getByteSize($a).$compare.$this->getByteSize($b).')';
		return $this->evaluateExpression($compareExpression);
	}

	/**
	 * Gets the size in bytes from verbose size representation.
	 * For example: '5K' => 5*1024
	 * @param string $verboseSize verbose size representation.
	 * @return integer actual size in bytes.
	 */
	function getByteSize($verboseSize)
	{
		if (empty($verboseSize)) {
			return 0;
		}
		if (is_numeric($verboseSize)) {
			return (integer)$verboseSize;
		}
		$sizeUnit = trim($verboseSize, '0123456789');
		$size = str_replace($sizeUnit, '', $verboseSize);
		$size = trim($size);
		if (!is_numeric($size)) {
			return 0;
		}
		switch (strtolower($sizeUnit)) {
			case 'kb':
			case 'k': {
				return $size*1024;
			}
			case 'mb':
			case 'm': {
				return $size*1024*1024;
			}
			case 'gb':
			case 'g': {
				return $size*1024*1024*1024;
			}
			default: {
				return 0;
			}
		}
	}

	/**
	 * Checks if upload max file size matches the given range.
	 * @param string|null $min verbose file size minimum required value, pass null to skip minimum check.
	 * @param string|null $max verbose file size maximum required value, pass null to skip maximum check.
	 * @return boolean success.
	 */
	function checkUploadMaxFileSize($min=null, $max=null)
	{
		$postMaxSize = ini_get('post_max_size');
		$uploadMaxFileSize = ini_get('upload_max_filesize');
		if ($min!==null) {
			$minCheckResult = $this->compareByteSize($postMaxSize, $min, '>=') && $this->compareByteSize($uploadMaxFileSize, $min, '>=');
		} else {
			$minCheckResult = true;
		}
		if ($max!==null) {
			var_dump($postMaxSize, $uploadMaxFileSize, $max);
			$maxCheckResult = $this->compareByteSize($postMaxSize, $max, '<=') && $this->compareByteSize($uploadMaxFileSize, $max, '<=');
		} else {
			$maxCheckResult = true;
		}
		return ($minCheckResult && $maxCheckResult);
	}

284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
	/**
	 * Renders a view file.
	 * This method includes the view file as a PHP script
	 * and captures the display result if required.
	 * @param string $_viewFile_ view file
	 * @param array $_data_ data to be extracted and made available to the view file
	 * @param boolean $_return_ whether the rendering result should be returned as a string
	 * @return string the rendering result. Null if the rendering result is not required.
	 */
	function renderViewFile($_viewFile_, $_data_=null, $_return_=false)
	{
		// we use special variable names here to avoid conflict when extracting data
		if (is_array($_data_)) {
			extract($_data_, EXTR_PREFIX_SAME, 'data');
		} else {
			$data = $_data_;
		}
		if ($_return_) {
			ob_start();
			ob_implicit_flush(false);
			require($_viewFile_);
			return ob_get_clean();
		} else {
			require($_viewFile_);
		}
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
	}

	/**
	 * Normalizes requirement ensuring it has correct format.
	 * @param array $requirement raw requirement.
	 * @param int $requirementKey requirement key in the list.
	 * @return array normalized requirement.
	 */
	function normalizeRequirement($requirement, $requirementKey=0)
	{
		if (!is_array($requirement)) {
			$this->usageError('Requirement must be an array!');
		}
		if (!array_key_exists('condition', $requirement)) {
			$this->usageError("Requirement '{$requirementKey}' has no condition!");
		} else {
			$evalPrefix = 'eval:';
			if (is_string($requirement['condition']) && strpos($requirement['condition'], $evalPrefix)===0) {
				$expression = substr($requirement['condition'], strlen($evalPrefix));
				$requirement['condition'] = $this->evaluateExpression($expression);
			}
		}
		if (!array_key_exists('name', $requirement)) {
			$requirement['name'] = is_numeric($requirementKey) ? 'Requirement #'.$requirementKey : $requirementKey;
		}
		if (!array_key_exists('mandatory', $requirement)) {
			if (array_key_exists('required', $requirement)) {
				$requirement['mandatory'] = $requirement['required'];
			} else {
				$requirement['mandatory'] = false;
			}
		}
		if (!array_key_exists('by', $requirement)) {
			$requirement['by'] = 'Unknown';
		}
		if (!array_key_exists('memo', $requirement)) {
			$requirement['memo'] = '';
		}
		return $requirement;
	}

	/**
	 * Displays a usage error.
	 * This method will then terminate the execution of the current application.
	 * @param string $message the error message
	 */
	function usageError($message)
	{
		echo "Error: $message\n\n";
		exit(1);
	}
360

361 362 363 364 365 366 367 368 369
	/**
	 * Evaluates a PHP expression under the context of this class.
	 * @param string $expression a PHP expression to be evaluated.
	 * @return mixed the expression result.
	 */
	function evaluateExpression($expression)
	{
		return eval('return '.$expression.';');
	}
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389

	/**
	 * Returns the server information.
	 * @return string server information.
	 */
	function getServerInfo()
	{
		$info = isset($_SERVER['SERVER_SOFTWARE']) ? $_SERVER['SERVER_SOFTWARE'] : '';
		return $info;
	}

	/**
	 * Returns the now date if possible in string representation.
	 * @return string now date.
	 */
	function getNowDate()
	{
		$nowDate = @strftime('%Y-%m-%d %H:%M', time());
		return $nowDate;
	}
390
}